Heiko von der Leyen is a medical director at Orgenesis, an American biotech company.

Reasoning:

• Heiko von der Leyen is listed as "Medical Director" on Orgenesis's own management team page¹, and his LinkedIn profile confirms the role "Medical Director at Orgenesis Inc. (Sep 2020 to present)"².
• Wikipedia states that "since December 2020, he is Medical Director of the company Orgenesis, which specialises in cell and gene therapies"³.
• Orgenesis is described as the "American biotechnology company Orgenesis," which focuses on cell and gene therapy research, with Heiko holding the position since 2020⁴; another source calls it a "U.S.-based biotechnology company"⁵.
• Multiple independent sources (company site, LinkedIn, Wikipedia, business databases, and a fact-checking outlet) consistently confirm both the role and the company's American identity.

Overall validity: 95%